Centrifugal machine.



0'; '1). EHREI'.

OENTRIPUGAL MACHINE.

APPLICATION FILED NOV. 1, 1904. RENEWED NOV. 6, 1906.

901,329. Patented v0st; 20, 1908.

STATES PAE T CORNELIUS-D; linear, or

ARDMORE, PENNSYLVANIA, ASSIGNOR TO WILLIAM L. DOLIER, OF PHILADELPHIA, PEXNSYLVANI.-\.

CENTRIFUGAL MACHINE a citizen of the United titates, residing at Ardmore, in the county of Montgommyand State of Pennsylvania, have invented new and useful. Improvements in Centrifugal Machines, of which the following is a specification. Y

vMy invention relates to driving mechanism for centrifugal machines, more especially to the type in which a basket is suspended in .a manner to permit gyrator mot-ion thereof while in operation.

. The objectof my invention to attain a very compact arrangement of driving mechanism and centrifugal basket and suspension, and to that end I dispense with the prior arrangements, wherein the driving mechanism and the basket are arranged one above the other on a suspension shaft. and on the contrary l'niount the driving mechanism .Ndirectlywithin the basket itself, thus eeono mizing spareby an amount equivalent to the longltudlnal space heretofore occupied in the driving mechanism w,hen located either fabove or belowthe basket.

In'the'operation of centrifugal baskets, as

' for example in the manufacture of sugar;

salt, :or other likema'terials. it found that the material to be-treated forms a wall nn Specification of Letters Patent.

923. Renewed November 6, 1906. Serial No. 342,294.

mediately. within the outer wall of the has-1 ket, such material. being thrown against the outer wall and" the center portions of the 1 basket being practically empty and unused.

Sincethe outcrportions of the centrifuga .basket' only are useful, the central portion thereof may be ei-nployed for the driving :mechamsm', as tor example, an electric "motor as herein shown and described.

For an illustrationof one of the numerous f -ms Which my invention may take, refergings in which: 1

e is to be had to the accompanying draw- Figure l is a vertical sectional View, of an apparatus embodying my invention. Fig. 2 ma horizontal sectional view taken on the line X X of Fig. 1. Fig. 3 is atop plan view of theupper yoke. of Fig. l.

Referring' to Fig. -1, 1 is a hanger consisting of a. single castingor a'two part casting I desired. Thishanger is supplied with i flanges 2 at ll'S upper extremity for the pur pose of securing the same. to a fixed object, f gforexample, a. mixer. Within the hanger 1 is provided a babbitt b'earing irfor thespher- 'the comnmtator revolves, and conversely if Patented Oct. 2o, 190s.

ical or ball member 4 which is shrunk upon or otherwise secured to the shaft or spindle. 5. li this ball and socket. arrangement the spindle or shaft 5 is perinitted to" gyratc ill a manner understood in this art. Upon the.

shaft 5 is seeurcd'a collar (3 which supports a washer T.

Sis a mass of rubber or other resilient. material embracing the shaft 5 and filling the interior of thehangm' 1 between the washer T and the washer U which maybe forced down and held in place 'by the nut 10 threaded upon the shaft 11 is the upper end of the shaft 5 made square for the purpose of engagement with '70 alock for the purpose of preventing the rotation of the shaft 5. such lock however permitting the 'gyration of the. shaft .3. The

resilient material 8 opposes the gvration of the shaft. The shaft 3 extends downwardly and has mounted thereon in a manner well understood in dynamo electric machinery [be stationary element S of an electric motor. Surrounding the elen'ient'S and separated fronrthe same by the usual air gap the rotatable motor element It. This molor may be either of the alternating current or direct current type. If of the alternating current type it may be an induction or asyn chrouous motor. the squirrel cage or short-f circuited-or secondary winding being within or upon the element It, while the. .primary winding may be on the stationary element S. As well understood this type of motor requires no connnulator and the only connections with the motor are with the. primary winding upon the non-rotatable element 5. Obviously however, the element R may carry the pr mary winding and the element S may 7 carry the squirrel cage winding. In such case however sliding contacts must b68111- ployedto lead the current to the rotatable element R. If the motor is'of the direct current type the rotatable element- 6 may be either the arrmiturc or the field, and the rotatable element Rinay be the field or the armature. Obviously however, brushes and commutator must be provided, and if the armature. winding is on the rotatable element the brushes will be stationary while the armature winding is upon the non'-rotatable element the commutator will be non rotatable while the brushes rotate.

The rotatable ele'ment'R is secp red bG-ll'O reinforced tween the two rings 12, such rings being pro vided with belt holes 13, the bolts passing through said rings and through the rotatable element R, care being taken to insulate said bolts from the element. R in certain cases, as for example in the alternating current motor. Integral with the rings 12 are the yoke arms 14: which unite at their inner ends in hubs 15. \Vithin these hubs are provided hearing bushings 10 which embrace the shaft 5 and afiord guide bearings for the rotatable element R- upon said shaft. The arms 14- constitute yokes for carrying bearings Whereby the rotatable element R is maintained concentric with the non-rotatable element 5. irrespective of the position the shaft. 5 may take during gyration.

A ball bearing is yoke whereby the weight of theinotor and basket are transferred to the shaft 5 and whereby friction is minimized in a well known manner. This ball bearing consists of the bearing ring 17 seated-in the hub 15 of the lower yoke. and of a similar bearing ring 18 seated in the non-rotatable member 19 supported by the washer 20 and the nut 21 engaging the screw threads on the lower endof the shaft 5. To prevent the nut from coming off during operation, the transversely extending pin 22 is provided. The, ring 17 rotates with the basket and the rotatable elemcnt lt while the ring 18 is nonrotatable since it is secured to the shaft 5.

At B is represented the centrifugal basket consisting o' the outer cylindrical wall 23 by the usual hoops or hands 23, the inner cylindrical wall 24, and the bottom 25, which may be stitl'ened or reinforced in a manner understood in the art. The basket is secured to the rotatable element of the motor by the nuts 26 which engage in the bosses 27 upon the yokes, the outer surfaces of said bosses being machined true.

From the foregoing description it apparent that the driving mechanism, in this instance an electric motor, is mounted on tirely within the basket, in a space which is practically useless in centrifugal baskets, in view of: the fact that the treated material ocgupies a position against the outer walls on y.

To afford electrlcal communization with the motor elements I provide a. longitudinally extending hole beginning at the upper end of the shaft 5 extending axially therethrough to the transverse hole at 28. Throngh this axial hole and through the transverse hole 28 may be led the conductors for connecting the motor w th the service Wires. Though I have shown the shaft 5 solid with the exception of the conductor channel, i. is. to be understood that said shaft may be hollow throughout its length, this allot-ding a very convenient means for leading conductors from the exterior to the provided at the lower non-rotat able element of motor. It is to be understood also that the proportions herein shown may be varied, as for example, the basket may be made of smaller diameter and of greater height and the motor elements may be so designed as to occupy a relatively greater space in a direction parallel with the shaft 5.

It is to be understood thatthough the motor may be entirely inclosed as herein shown that the motor elements may project above or below the basket. In any event a great economy in space is cllected by placing the motor within the basket thus utilizin a space otherwise unused. It is to be understood also that my invention is not limited to the exact structure of basket as herein shown but that the basket may be constructed in any suitable manner so long as a space about the center of the same is provided to accommodate the driving mechanism.

. It. is to be understood that my invention is not limited to the location of the center ofgyration or oscillation at a. point above the motor and centrifugal, for it is obvious that. such center of gyration or oscillation may be located at. a point beneath the motor and basket; or at any other point as known in the art.

lVhatI claim is:

1. In combination. a centrifugal basket, and an electric driving motor therefor, the rotatable element of said motor being substantially entirely surrounded by said basket.

In combination, a centrifugal basket, and an electric motor for driving the same, said motor being substantially entirely surrounded by said basket.

3. In combination, a centrifugal basket,

and an electric driving motor therefor, the

rotatable. element at said motor being substantially entirely surrounded by and secured to said has:

4:. In combination, a ceu'tri'fugal basket, comprising concentric cylinders of diff. rent diameters, and a, driving motor therctm' located within the cylinder of lesser diameter.

5. In combination. a centrifugal basket comprising outer and inner walls, and a driving motor therefor located in the space surrounded by said inner wall.

6. In combination, a gyratory member,the a motor secured to said member, the rotatable element of said motor detlectable with. said non-rotatable element. and maintained concentric therewith, anda centrifugal basket surrounding said rotatable motor elen'ient-and secured thereto.

"7. In combination, a. gyratory shaft, the nonu-otatable elei'nent of a motor secured to said shaft, the rotatable element of said, motor dei'lectable with said non-rotatable element and maintained concentric therewith, and a centrifugal basket surrounding said rotatable motor element and secured thereto.

fIn .combination, gyratory shaft, the

non-rotatable element of a motor secured to said shaft, the rotatable element of said mo tor defle'ctable with said non-rotatable ele- -55 ment and maintained concentric therewith.

and a centrifugal basket comprising concen- I thereto. v l

9. In combinatiomra motorhnounted upon a gyratory suspension. and a centrifugal fbasket securedto the rotatable. element of motor and comprising outer and inner walls, said motor being surrounded by said inner wall.

' Y: "IO/In combination. agyratoryshaft, the non-rotatable. element of a motor secured fthereto. the rotatable elementof said motor '1 j H deflectable with said'non-rotatable element and" maintained concentric therewith, a contrifugalbasket surrounding said motor and secured to the rotatable element thereof, and

V "a ball bearing intermediate the rotatable members and said shaft,

,tory shaft, a centrifugal basket supported by saldshaft, the rotatable element of a driving v11..In combination, a non-rotating gyramot-or'surrounded by said basket, and the non-rotating element of said motor secured a to saidshaft.

, 12. Incombination, a centrifugal basket,

- an electric motor'of the alternating chrrent {induction typefor driving said basket, the tmotor secondary being surrounded by and P secured to said basket.

, 13. In combination, a centrifugal basket. and, an electric motor for driving the same.

the rotatable element of said motor being secured directly upon and surrounded by said l 4 0 basket.

' 1-L., In combination, an electric motor, a gyratory suspension therefor, and a centrifngiil basket secured directly to and surrounding the rotatable element of said motor.

451 15. In combination, a gyratory spindle,

the non-rotatable element of an electric motor secure thereto, the rotatable element of said mot mounted for gyration with said non-rotatable element, a channel in said spindle to receive conductors leading to said motor, and a centrifugal basket secured directly to the rotatable elementof'said motor.

16. In combination, a gyratory spindle, the primary of an induction motor secured r thereon, a channel in said spindle to receive .56 conductors leading to said primary, the secondary of said motor gyrat-ing with said spindle, and a centrifugal basket secured directly to said secondary.

17. In combination, a gyratory spindle, a centrifugal basket surrounding said spindle and gyrating therewith, and an electric mo tor intervening between said basket and spindle for driving said basket.

18. In combination, a gyratory-shaft, a

non-rotatable element of a motor secured upon said shaft, acentrifugal basket surrounding the rotatable motor element, and a rotatable yokesupporting said basket and" rotatable motor element in operative relation with respect to said shaft.

19. In combination, a gyratory shaft, 8, non-rotating element of a motor secured: thereto, a centrifugal basket surrounding the rotatable motor element, ayoke having latera-l and end bearings on said shaft,-s aid basket and rotatable motorelement being be cured to said yoke. I

20/ In combination, a centrifugal basket, an electric motor of the alternating current induction type for driving said basket, the motorprimary disposed within the motor secondary, a yoke supporting said basket and the motor secondary, said basket surrounding the motor secondary and secured thereto and to said yoke. v

CORNELIUS D. EHRET. Vitnesses 1 EDNA Cumulus, Enrrn BAHN. 

